Screen fcr sand, gravel, &amp;c.



G. A. s'ElvouR.l SCREEN FOR SAND, GRIIVEL, Gac,

APPLICATION FILED JUANE 9,19I1.

Patented Dec'..2(), 1921.

. lmuemtoz GEOEGE H EIVOUIE.

GEORGE fr. SEVOUB, 0F DETROT, MECHGAN.

SCREEN FOR SAND, GRAVEL, o.

Application filed .Tune 9, 1917.

To all whom t may concern:

lle it known that l, Gannon ifi. Snivoun, a citizen of the Unitec Statesj residing at Detroit7 county of Vifayne, State of Michigan7 have invented a certain new and useful improvement in Screens for Sand, tzlraveh 5cc.3 and declare the following to be a full, clear, and en ct description of the saine, such as will enable others skilled in the art to which it pertains to maire and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to screens for sand, gravel or other material and its object is a screen fabric that is practically inexpensive to manufacture, which is easily repaired, and that may be built up in units of any desired length.

.it is to be understood that the screen faerie is to be molded upon a form of any suitable character; that the material to be ,screened is to be delivered into the interior o tl f l esired material is thus screened out and dey described hereinafter, the screen fabric 4f.onsistingv of a series of rods extending longtu inally of the completed fabric and cross wires are wound about each of these rods in such manner that the interstices between the wires are in staggered relation on each side of the longitudinal rod. By this arrangement of the cross wires the particular object of the invention is attainednarnely, the material tending to ride about the cylinder on any two wires or series of wires meets an obstruction at each longitudinal rod which assists in breaking up the lumps and enables material that is not readily screened by screen fabric of other forms to be readily screened. By this arrangement a screen fabric is provided having an increased capacity over the usual well known fabrics as, for instance, wire cloth ordinarily used in this work. rlhese and other objects and the several novel features of the invention in its preferred form are hereinafter more fully described and claimed and shown in the accompanying drawings in which- Figure l is an elevation of the portion of a screen embodying my invention.

Fig. 2 is an end elevation thereof showing the screen fabric mounted on a form? Specication of Letters Patent.

Patented Deco 2Q., M1521.

serieu nu. 173,844.

Fig. 3 is a detail of a portion of the fabric showing the method by which the transverse wires are held in position.

t is -an enlarged detail showing the inode of winding the wires on the longitudinal rods.

is an end view of Fig. 4l.

Fig. 6 is an enlarged detail of the mode of fastening the ends of the transverse wires.

Eig. 7 is a plan view of Fig. 6.

is above stated, it is to be understood that the fabric herein described may be supported on a forni of any approved character, preferably one that is cylindrically shaped and rotatable, the material being delivered into the interior of the screen whereby the desired ma eiial is passed through the screen and the waste and undesired material is delivered at the lower end thereof7 and in order that the waste material may pass out at the lower end the screen is preferably positioned with the longitudinal axis thereof at an angle to the horizontal. as is usual. The screen is made up of a series of longitudinal rods l, l, l, etc., positioned substantially eouidistantly apart about the forni, as will. be understood from Fig. 2, and the transverse wires 2 are i,)referably formed previous to erection with loops 3 positioned equidistantly apart through which the longitudinal rods l entend as will be understood particularly from Figs, l, 3 and 41. rihese loop members 8 are so formed that the strand portions or wires extending from one rod to the next are in staggered relation in the adjacent spaces on each side of any rod. For instance, the wire 3 in the space 4 indicated in Fig. 3 is wound about a rodeat and the strand extending from the said rod to the nent is out of alinement with the rod in the space e. lt is thus to be seen that the space between two adjacent wires, as is shown more fully in la is not a continuous space about Vthe cylinder and material rolling about the cylinder positioned on two adjacent wires might roll on these wires without breakage or disintegration completely about the cylinder if the space was continuous and uninterrupted. ln the arrangement here shown, however, the material may roll on two adjacent wires only from one longitudinal rod to the next where its continued movement is interrupted and its travel is thus impeded. at every junction of the longitudinal rod and cross Wires. This arrangement facilitates the breaking up of lumps and results in a largely increased output of a screen of any particular size in comparison with the screens of any Well known character, for instance, ot the Woven Wire type.

lThe screen may be made of any desired size for material of various characters by using a Wire and rods of proper diameter for the Work to be performed. YVith sand or gravel, the rods are usually about liveeightlis of an inch in diameter and the Wire about No. @ne turn of the Wire Vin form* ing the loop for the rode` will space the Wires about one-fourth of an inch apart. Other spacing Vmay be produced by making a number of turns for the loop and if smaller transverse wires are desired several turns may be required to produce the proper spacing for the Vmaterial to be screened. 1With the usual Wire cloth and the like used in the manufacture of screens, upon occurrence of brealage'in the cloth the entire screen envelop of the form must be replaced with a new one. in object of the construction here shown is to allow for ready and immediate repair that may be inexpensive and quickly performed. lt is to be understood that the transverse Wires with the loops 3 properly formed therein are in quantity and the rods, as will be understood from Fig` l, are provided with a nut or head 6 at one end thereof and are threaded at the opposite end as will be understood from 3, being provided with a nut 7. By tightening these nuts the transverse Wires 3 may be properly positioned on the rods. if a breakage of one orseveral of the wires takes place-say intermediate the ends of the rods, the broken Wires are simply removed from the rods Without disturbance of the other Wires, and by withdrawing the nuts 7 from the respective rods l a sufficient number of new Wires may be placed on the rods l Y whereupon the nuts 7Umay be turnedup and force the remaining Wires into the position occupied by the broken Wires.

lf only a single Wire is broken the said Wire may be removed and the nuts tightened upto force the remaining wires across the space and the operation of the screen continued as the work of the screening would not be materially reduced by removal of one modes? or two Wires. The tivo ends of the transverse Wires 3 are held between a pair of bars S and 9 clamped together by means of a bolt or nut l0, as Will be understood from Figs. 2 and 7, and in the case of the large screen it may be preferable to make the transverse Wire 3 in tvvo halves in which event the clamping bar is used on opposite sides of the forni to secure the ends of the Wires together as Will be readily understood.

From the foregoing description it becomes evident that the fabric is inexpensive to manufacture and cheaply assembled; that a screen of very high eliiciency is provided, the output inrpractice being found to be as great as fifty per cent. over that of thn usual Woven Wire screen, and further, that repairs are quickly and cheaply made and Without this organization 'of the form or parts of which the screen is comprised.

Having thus briefly described my invention, its utility and mode of operation, what l claim and desire to secure by Letters Patent of the United States isl. A screen consisting of a series ofvivire strands each having substantially equi-distantly spaced loops formed sequentially on opposite sides, a series of rods passing' through the loopV portions, the strands 1seing positioned so that the loops on any single rod are formed on the saine side of each strand, meansindividual to each rod for forcing the loops into engagement thereon, a form censisting of circular members on Which the screen fabric rests, and means for fastening the ends of the strands together.

2. A' screen fabric consisting of series of circular Wire strands having substantially equi-distantly spaced loops formed in sequence on opposite sides of the strand externally of the area circumscribed thereby, a rod in each series of loop portions, means individual to each rod for forcing` the Wires of the loops thereon in engagement longitudinally of the rod, each Wire being so looped that the tivo end loops are on opposite sides ofthe strand whereby the ends of the Wire may lie side by side when the wire is arranged ina circle, and means for securing the said ends of the series of strands together.

ln testimony whereof I sign this specification.

GEORGE A.' SEIVOUR. 

